CVE-1999-1246: Direct Mailer feature in Microsoft Site Server 3.0 saves user domain names and passwords in plaintext in the T

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HIGH 7.5WATCHLISTDOWNGRADE

CVE-1999-1246 is a high-severity flaw (CVSS 7.5) affecting site server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Direct Mailer feature in Microsoft Site Server 3.0 saves user domain names and passwords in plaintext in the TMLBQueue network share, which has insecure default permissions, allowing remote attackers to read the passwords and gain privileges.

Why this priority

High severity
EPSS top 5%: very likely to be exploited
On your watchlist

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	9.2% (top 5%)
CISA exploited list	No
Published	1999-12-31
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: microsoft

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

1999-12-31 05:00 UTCPublished CVE record published
2026-06-16 21:50 UTCUpdated Record last modified

microsoft site server DOWNGRADE

Affected: 3.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.0

1. Check installed version

apt-cache policy site-server || rpm -q site-server || site-server --version

2. No fixed release: DOWNGRADE to a release before 3.0 (Debian / Ubuntu)

apt-cache madison site-server sudo apt install site-server=<VERSION_BEFORE_3.0> sudo apt-mark hold site-server

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list site-server sudo dnf downgrade site-server-<VERSION_BEFORE_3.0> sudo dnf versionlock add site-server

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-1999-1246?

site server: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-1999-1246 being exploited?

CVE-1999-1246 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-1999-1246 affect?

CVE-1999-1246 affects site server. Severity is high (CVSS 7.5). Direct Mailer feature in Microsoft Site Server 3.0 saves user domain names and passwords in plaintext in the TMLBQueue network share, which has insecure default permissions, allowing remote attackers to read the passwords and gain privilege

How urgent is CVE-1999-1246?

Priority 55/100. High severity; EPSS top 5%: very likely to be exploited; On your watchlist

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References

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